Extremely cold air making its way in. We were cool today. Here comes the cold. And tomorrow, you will feel it. 20 to 30 degrees colder. Winds 20 to 30 miles an hour. Windchills near 5 to 15 degrees. Its going to feel so much colder tomorrow. I hope youre ready. Were also talking a little bit of snow, some ice. Aye give got a lot in my forecast. Thank you, doug, sounds like it will be a real shock to the system. The bitter cold is already impacting millions across the country. As people here get ready to break out the heavy coats and hats. Local crews are also getting ready. The Virginia Department of transportation sent this tweet today saying its officially snow season as crews begin treating the roads. Our bureau chief Tracee Wilkins continues our coverage in Upper Marlboro to tell us how people there are preparing. Reporter its already starting to get cold here tonight. I know were going to really feel it tomorrow. Folks we spoke to here saying theyre getting ready for it. An arctic blast is headed our way, folks are preparing and buying those space heaters. I have a guess cot coming, theyre going to be in a room, i guess because of the cold, i do i wanted to make sure theyll be warm. Theyre coming up from florida. Reporter storm team 4 is predicting temperatures to take a major dive with a windchill that may feel as cold as 15 of in some cases 5 degrees. Thats why im staying in. Reporter its got ernest already thinking about snow and ice melt and snow blowers. Im always a step ahead of time. You know, this Mother Nature stuff here, so when Mother Nature comes, you better be ready. Reporter yeah. Im getting ready now before Mother Nature comes. I know its coming. Reporter hes absolutely right, since theres the chance of wet snow and ice early saturday, later turning to rain. They might say, hey, were just going to get a flurry, there might come a foot. Never know. Reporter youre goio reporter meanwhile at the Prince Georges County department of social services obviously were all concerned about what would happen with the Homeless Population in this kind of weather. Reporter the department is making its way to homeless camps and trying to get the most vulnerable off the streets. This after two people died here including one homeless man found in an outdoor camp last winter. We have been focused all year on building those relationships and going to where we know they are and we also ask citizens to call and let us know if they have noticed people who are residing outdoors. Reporter now the Prince Georges County department of social services would like the publics help. If you see someone whos sleeping outside in an outdoor camp, give them a call, go on to nbc washington and search homeless hotline. Back to you in the studio. Tracee wilkins, thank you. During the commercial break ahead, download the nbc washington app to watch our live in wintery mix moves in on us. Now, hightech summit at trump tower today while the president elect was pledging to work with some of the Biggest Companies in Silicon Valley. Democrats in congress were raising questions about possible conflicts of interest. Steve handelsman joins us now with the latest on this. Steve . Reporter talk about pennsylvania avenue, jim, but first trump tower. Many of the leaders of Silicon Valley, frankly, questioned Donald Trumps fitness to be president , but like other American Business leaders, now they want his help and he says theyre going to get it. Jeff bezos of amazon came to trump tower, eric schmidt and larry page of google, cook of apple, musk of tesla, cast of oracle, ceos of whom backed Hillary Clinton welcomed by president elect trump. Were going to be there for you and youll call my people, youll call me, it doesnt make any difference, we have no formal chain of command. Reporter the ceos for techsavvy immigrants that Silicon Valley counts on. Peter thiel of face boonk abook others are advising trump. Cyber security is one issue and its links to Vladimir Putin, still Rex Tillerson could overcome his ties to putin and exxonmobil job and win confirmation. Its very hard to see the ceo of a big oil conglomerate as secretary of state, but well see. He may surprise us all. Reporter democrats charge trump as a ceo has a conflict in washington. His new hotel where foreign diplomats and businessmen admit theyre going to curry favor with trump. Not legal, say democrats. Every one of those dollars that hits the hotel come january 20th will be in violation of the United States constitution. Reporter trump they say must cash out of his entire business. But the president elect has delayed disclosing everything that he owns and delayed publicly revealing any kind of a what might be good for the trumps and on the other hand what might be good for the nation. Im steve handelsman, news 4. Jim . Thanks, steve. Donald trump was supposed to have a News Conference tomorrow to outline his plan to prevent conflicts of interest between his Business Empire and his duties as president. On monday, he abruptly postponed the conference. That same night he tweeted that he would be turning his company over to his adult sons. Two lawyers who have advised past president s on ethics say that that announcement falls short and Senate Democrats are calling on trump to follow the advice of the office of government ethics. They say that he should divest his holdings and put the proceeds in a blind trust that is not controlled by members of his family. The idea that President Trump would be dogged from day one by questions about whether he is acting in his own personal interest, his business interest, thats no small matter. Adding to the concern a newsweek report that turkeys president erdogan is already using leverage against his political opponent. In about a month hundreds of thousands of people will converge on the National Mall for Donald Trumps inauguration. Plans are well under way for ceremony, the parade and the protests. News 4s tom sherwood got a closeup look at the preparations today. Reporter inaugural planner for the joint Task Force National capital region, Army NationalSergeant Aaron lovely introducing reporters to a giant 60 x 40 foot map used to stage inaugural practice to guide logistics for 15,000 military personnel. New on the map this year, the new trump hotel at 12th and pennsylvania. Yet another site that could see protests. Clearly at this point, the biggest concern are the number of potential protesters. Reporter the military personnel dont do police work secret service, d. C. Police and other Law Enforcement. If something bad, its up to the Law Enforcement agency to make the first move, if you will, and only if needed would they call on the national guard. Reporter none of the military on the street will be armed. Their job is crowd control and ceremonial events. We just try to instill in them the historical significance of this peaceful transfer of power in our democracy and what it represents not just to our country but really to the entire world. Reporter nearly a year of planning is about to be tested for all involved. Lieutenant colonel freeman of maryland is in charge to make sure everyone is fed and housed. Is the food good . The food is always good. Military food is always good. You can work 12, 14, 16 hours if you have to. Weve all done it. Think were ready. Reporter in the district, tom sherwood, news 4. Airport workers are on strike. They say they need better pay. Some of them are making about 6 an hour working as wheelchair attendants and baggage handlers at national and dulles airports. The contracted employees want 15 an hour. Virginias attorney general and some state politicians support workers at a rally this morning at national airport. Were told those strikes are not affecting travel. A top civil rights leader is taking the worlds Biggest Airline to court. He says americanairlines booted him from a flight because of his race. Chris gordon is live at Reagan National airport with details of the discrimination lawsuit. Chris . Reporter well, doreen, reverend William Barber is nationally known. In midapril, he flew into washington, d. C. , to deliver a speech intending to return home that night to raleigh, North Carolina, but he tells me what happed airport when he boarded his americanairlines flight was embarrassing and humiliating. Reverend dr. William barber is a minister and civil rights leader. Hes the president of the North Carolina naacp. He spoke at the Democratic National convention the night Hillary Clinton accepted the president ial nomination. Today, reverend barbers lawyers filed this federal lawsuit against americanairlines for discriminating on the basis of race when it removed him from a flight from Reagan National airport to raleigh, North Carolina, the night of april 15th. And there were some persons behind me talking very loud, sounding as if they were intoxicated and i just asked if they could just bring it down some. Asked the stewardess would she ask them to bring it down . Reporter reverend barber has a disability that makes it hard to walk or turn his head, buys his legs while flying. The person was belligerent, using ce inine ining code words reporter she witnessed the exchange. I was shocked when the police came on. Reporter reverend barber said the police attendant called police to escort him from the plane allowing the loud passengers behind him to fly to raleigh. His lawyer says its racial profiling. The fligtht attendant sees a africanamerican man and says he must be the problem. Get him off the plane and we will fly. Reporter at our request for comment, americanairlines issued this statement. American does not tolerate discrimination of any kind and we are committed to providing a positive travel experience for all of our passengers. Now, the statement from americanairlines to news 4 concludes, we are not able to discuss the specifics of this matter as it now involves litigation. Thats the latest live tonight from Reagan National jim, back to you. Thanks, chris. The feds raised the Interest Rate for the second time in only a decade. Were going to take a closer look at the impact on you, your family and wallet. Dramatic video as flames shoot from the windows of a hospital. Why did this scene cause panic in new york city and what were now learning about a cause. Its rare that a construction site gets robbed. Its rare that a truck driver is shot. But thats what happened tday o always wins. Especially in my business. With slow internet from the phone company, you cant keep up. Youre stuck, watching spinning wheels and progress bars until someone else scoops your story. Switch to comcast business. With highspeed internet up to 10 gigabits per second. You wouldnt pick a slow race car. Then why settle for slow internet . Comcast business. Built for speed. Built for business. First time in a year, the Federal Reserve is raising a key Interest Rate. The central Bank Increased the rate by one quarter of a point today. The last rate change was back in december of 2015. Interest rates have been extremely low since the 2008 financial crisis. And todays action is a sign that the fed expects higher inflation. Wall street reacted with its worst day in two months. The dow fell nearly 120 points. The nasdaq was down 27. The s p 500 lost 18 points. Heres susan hogan now with a closer look at the impact of the rate hike. Well, the bottom line, the feds action should have little effect on mortgages, your on some other loans will likely rise soon. Credit cards, most charge variable Interest Rates tied to the prime rate, so a quarter percentage point rate hike means youll pay an extra 25 a year for every 1,000 of debt. According to nerd wallet. Mortgages, if you have an adjustable rate mortgage, it will certainly be going higher. One option is consider refinancing sooner rather than later. Auto loans, if youre purchasing a new car one rate change wont have a huge effect on the rate you get. A quarter percentage point on a 25,000 loan is roughly 3 and that also is according to bank rate. And Student Loans, the good news here is federal student loan rates are fixed so most borrowers wont be impacted by a rate hike, but a private loan with a variable rate will most likely increase. Right now, this is so marginal and so incremental that the effect on anybodys life in moderate. Now home equity lines of credit will also be impacted slightly. To learn more about the impacts on your wallet, just head over to our nbc washington app and search rate hikes. A fire pierced the manhattan skyline today sparking panic. Somebody posted this video to twitter showing flames shooting from a building at nyus langone medical center. Streets were shut down as officials investigated. Were told the buildings under construction. Investigators arent sure what sparked the fire but they say it started on the seventh floor. No one was hurt. The Sandy Hook Community is pausing to take stock and to honor the victims from the day that barack obama has called the worst day of his presidency. Flags in newtown, connecticut, are at halfstaff today. It was on this day in 2012 that a gunman killed his mother and then shot his way into san day hook elementary school. He killed 20 first graders and 6 them. The school was eventually torn down and a new school built on the same site opened in august. Now to an Armed Robbery and a rather unusual location. Tonight, a man is in Critical Condition after a shooting at a construction site. It happened in broad daylight at a site just off danville road in brandywine, maryland. Thats where pat collins is right now. Pat . Reporter jim, i might be wrong, but i bet you could go to virtually any construction site, have everybody empty their pockets and you might not come up with more than 100 bucks. So why would someone do Something Like this . Unlikely robbery victims. The two drivers of these two tractor trailers held up at gunpoint at high noon at this remote construction site in brandywine, maryland. One of the victims shot and wounded. Tonight, they say hesn Critical Condition. The victims worked for rlo contracting, an Excavation Company out of dayton, maryland. The trucks carry what they call grindings, remnants of trees and stumps removed during the excavation process. Today, i talked to representatives from rlo contracting about this violent crime. We really dont know what to make of it. Were really stunned. The first time anything like this has ever occurred for us. Reporter its so unusual to rob someone on a construction site. What do you think these gunmen could possibly get . They took cell phones and a few dollars. That was it. Reporter that was it. That was it. Reporter this is a rural area and people who live around here say theyre not used to this kind of violence. Thats not good. That aint good at all. So thats odd. Im surprised because this area is, you know, quietly. My kids play in this area and i never hear that. Reporter again, this place is rural. Its surrounded by woods. At night, it gets country dark. Heather, hit the lights. Well, now you get the picture. So how did these robbers get away from the scene . Well, police say they ran away on foot. And theyre still at large. Doreen, back to you. Pat collins reporting. Thank you, pat. Transforming tysons. Tonight, a closer look at plans for a new bridge across the beltway. And why people in the area say its so badly needed. Been going on for months and only getting worse now. Well tell you why some people say metro is causing their homes to shake. And it keeps them up at all hours of the night. Coming up on news 4, why hundreds of pic to get into thisouse today for h so maybe youve heard by now its going to get really cold tonight. Doug and amelia are in storm center 4 tracking what will for us. Hey, guys. Yeah, hey, doreen. Really the amazing thing is its really not all at bad right now. Temperatures today around the average, average high is 47. Next 12 hours, completely different. Singledigit windchills will greet queyou tomorrow morning. Youre looking at the numbers. This is the coldest air weve had in december since 2010. That means we have very cold arctic air moving in, again, its moving in overnight. 44 degrees the current number. Winds out of the southwest at 7 miles per hour. If you walk outside right now, not all that bad. You may not need the heavy coat. By this time tomorrow, yeah, things changing bigtime. 44 d. C. 46 gaithersburg. Right now warrenton coming in at 35 degrees. Nothing on the radar yet. But we could see a couple of snow showers in here by overnight tonight. Well talk about that in a second. Satellite and radar showing the cloud cover making its way in here. But also showing the front moving in. Heres the front right here. This is the jet stream actually. To the north of this, thats where the cold air is. And temperatures are they cold just to the north. Lets show you the future weather here tonight. The clouds definitely in a